Improve sound and performance by decreasing exhaust backpressure with our catalytic bypass kit. - + 18 crank hp & + 13 crank torque. - weighs 28 lbs. (13 kg). - t 304 stainless steel. - made in europe. - reduces thermal load on the heads. We recommend purchasing one our prepackaged installation kits, part # FVDmk993301 please note: cat bypass pipes are not c.a.r.b. Certified (california) and are for racing use only. FVD is not responsible for emissions compliance. Engine management software must be updated to avoid a check engine light, purchase part # FVD99361891 or FVD99361890.